import axios from 'axios'
import {getToken} from '@/utils/auth'

const mimeMap = {
  xlsx: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
  zip: 'application/zip'
}

const baseUrl = process.env.VUE_APP_BASE_API
export function downLoadZip(str, filename) {
  var url = baseUrl + str
  axios({
    method: 'get',
    url: url,
    responseType: 'blob',
    headers: { 'Authorization': 'Bearer ' + getToken() }
  }).then(res => {
    resolveBlob(res, mimeMap.zip)
  })
}
/**
 * 解析blob响应内容并下载
 * @param {*} res blob响应内容
 * @param {String} mimeType MIME类型
 */
export function resolveBlob(res, mimeType) {
  const aLink = document.createElement('a')
  var blob = new Blob([res.data], { type: mimeType })
  // //从response的headers中获取filename, 后端response.setHeader("Content-disposition", "attachment; filename=xxxx.docx") 设置的文件名;
  var patt = new RegExp('filename=([^;]+\\.[^\\.;]+);*')
  var contentDisposition = decodeURI(res.headers['content-disposition'])
  var result = patt.exec(contentDisposition)
  var fileName = result[1]
  fileName = fileName.replace(/\"/g, '')
  aLink.href = URL.createObjectURL(blob)
  aLink.setAttribute('download', fileName) // 设置下载文件名称
  document.body.appendChild(aLink)
  aLink.click()
  document.body.removeChild(aLink);
}

export function getTemplate(url, fileName) {
  var str = baseUrl + url
  axios({
    url: str,
    method: "get",
    responseType: "arraybuffer",
    headers: { 'Authorization': 'Bearer ' + getToken() }
  })
    .then(
      function (response) {
        let filename = fileName;
        fileDownload(response.data, filename);
      }.bind(this)
    )
    .catch(err => {
      console.log(err);
    });
}

function fileDownload(data, fileName) {
  let blob = new Blob([data], {
    type: "application/octet-stream"
  });
  let filename = fileName || "filename.xls";
  if (typeof window.navigator.msSaveBlob !== "undefined") {
    window.navigator.msSaveBlob(blob, filename);
  } else {
    var blobURL = window.URL.createObjectURL(blob);
    var tempLink = document.createElement("a");
    tempLink.style.display = "none";
    tempLink.href = blobURL;
    tempLink.setAttribute("download", filename);
    if (typeof tempLink.download === "undefined") {
      tempLink.setAttribute("target", "_blank");
    }
    document.body.appendChild(tempLink);
    tempLink.click();
    document.body.removeChild(tempLink);
    window.URL.revokeObjectURL(blobURL);
  }
}
